I am selling my 3W 3D carbon fiber propeller (31.5x8-14). These are expertly matched to the 3W150-170cc engines, and they work great for IMAC and for 3D flying. Here is a link that shows the specs of this prop, straight from Aircraft International. http://www.aircraftinternational.com/Home/ProductDetails/tabid/84/ProdID/747/RtnTab/64/PageIndex/1/CatID/6/Default.aspx
My propeller is in excellent condition. I currently am only flying 35% 100cc class airplanes, and I don't need the propeller right now. I may trade for a couple of 28x10 propellers. Feel free to text, call, or email. Thanks!